Pulse current generating circuit, generating method and semiconductor-pumped laser

Abstract

The application provides a pulse current generating circuit, a generating method and a semiconductor pumped laser, comprising: a pulse signal control module and a driving source module connected in sequence; the driving source module is composed of multiple driving source units in parallel; the pulse signal control module is connected with an external driving square wave output device; and the pulse current generating circuit is connected with an external laser diode array. In this way, by arranging multiple driving source units in parallel, the input power of the pulse current generating circuit is reduced, the volume and weight of the pulse current generating circuit are reduced, the grid input power of the pulse current generating circuit is reduced, the operation safety and stability of the pulse current generating circuit are improved, and the safety of other devices connected with the semiconductor pumped laser is improved.

Description

Technical Field

[0001] This invention relates to the field of pulse power supply technology, and in particular to a pulse current generation circuit, generation method and semiconductor pumped laser. Background Technology

[0002] A semiconductor-pumped laser is a laser that uses a semiconductor solid-state laser material as its power source. It has unique application prospects in high-tech fields such as space communication, fiber optic communication, atmospheric research, environmental science, medical devices, optical image processing, and laser printers. A semiconductor-pumped laser includes an interconnected pulse current generation circuit and a laser diode array. The pulse current generation circuit provides pulsed current to the laser diode array.

[0003] Existing pulse current generation circuits have relatively high single-unit power, typically exceeding 10KW, resulting in large size and weight, causing inconvenience in production, transportation, installation, debugging, and maintenance. Furthermore, existing pulse current generation circuits have high mains input power, which can affect the circuit's own operational safety and stability, and consequently, the safety of other equipment connected to the semiconductor-pumped laser. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a pulse current generation circuit, a generation method, and a semiconductor pumped laser, which can reduce the size and weight of the pulse current generation circuit and reduce the grid input power of the pulse current generation circuit, thereby improving the operational safety and stability of the pulse current generation circuit, and further improving the safety of other devices connected to the semiconductor pumped laser.

[0005] In a first aspect, embodiments of the present invention provide a pulse current generation circuit, comprising: a pulse signal control module and a drive source module connected in sequence; the drive source module is composed of multiple drive source units connected in parallel; the pulse signal control module is connected to a drive square wave output device of an external device; the pulse current generation circuit is connected to a laser diode array of an external device; the pulse signal control module is used to generate a polling signal and receive a square wave drive signal output by the drive square wave output device, and send the square wave drive signal to each drive source unit according to the polling signal, so that the drive source unit generates a square wave pulse current according to the square wave drive signal; the drive source module is used to synthesize the square wave pulse current output by each drive source unit, the synthesized square wave pulse current is a pulse current, and output the pulse current to the laser diode array.

[0006] Furthermore, the pulse signal control module is composed of multiple D flip-flops connected in series; each D flip-flop corresponds to a driving source unit; the D flip-flops are used to generate polling signals based on the reference clock signal.

[0007] Furthermore, the driving source unit includes a charging circuit, a leading edge boosting circuit, and a main output circuit; the first terminal of the leading edge boosting circuit is connected to the first terminal of the charging circuit; the first terminal of the main output circuit is connected to the second terminal of the charging circuit; the second terminal of the leading edge boosting circuit is connected to the second terminal of the main output circuit; the main output circuit is used to generate a constant square wave pulse current according to the square wave driving signal; the leading edge boosting circuit is used to perform leading edge compensation on the square wave pulse current.

[0008] Furthermore, the leading edge enhancement circuit includes: an energy storage sub-unit and a first IGBT switch connected in sequence; the energy storage sub-unit is connected to a charging circuit; the gate of the first IGBT switch is connected to the main output circuit; the gate is connected to a pulse signal control module; the emitter of the first IGBT switch is connected to the anode of the laser diode array; the charging circuit is used to provide electrical energy to the energy storage sub-unit so that the energy storage sub-unit stores electrical energy; the first IGBT switch is used to close when a square wave drive signal is received so that the energy storage sub-unit is connected to the main output circuit; the energy storage sub-unit is also used to perform leading edge compensation on the square wave pulse current generated by the main output circuit when connected to the main output circuit.

[0009] Furthermore, a current limiting device is provided between the energy storage sub-unit and the aforementioned first IGBT switch; the current limiting device is used to limit the current of the leading edge boosting circuit.

[0010] Furthermore, the main output circuit includes: an electron discharge unit and a second IGBT switch connected in sequence; the electron discharge unit is connected to a charging circuit; the gate of the second IGBT switch is connected to the gate of the first IGBT switch; the gate of the second IGBT switch is connected to a pulse signal control module; the first IGBT switch and the second IGBT switch respond synchronously to a square wave drive signal and close simultaneously; the emitter of the second IGBT switch is connected to the anode of the laser diode array; the charging circuit is used to provide electrical energy to the electron discharge unit so that the electron discharge unit stores electrical energy; the second IGBT switch is used to close when it receives a square wave drive signal so that the electron discharge unit generates a square wave pulse current and sends the square wave pulse current, after compensation by the energy storage subunit, to the laser diode array.

[0011] Furthermore, the leading edge boosting circuit also includes a first diode and a second diode; the main output circuit also includes a third diode and a fourth diode; the emitter of the first IGBT switch, the first terminal of the first diode, and the first terminal of the second diode intersect; the second terminal of the first diode is connected to the laser diode array; the second terminal of the second diode is grounded; the emitter of the second IGBT switch, the first terminal of the third diode, and the first terminal of the fourth diode intersect; the second terminal of the third diode is connected to the laser diode array; the second terminal of the fourth diode is grounded.

[0012] Furthermore, the pulse current generation circuit also includes a power supply module; the power supply module is connected to the drive source module; the power supply module is used to supply power to the drive source module.

[0013] In a second aspect, embodiments of the present invention provide a pulse current generation method, applied to the pulse current generation circuit of any of the above claims; the method includes: generating a polling signal through a pulse signal control module and receiving a square wave driving signal output by a driving square wave output device; sending the square wave driving signal to each driving source unit according to the polling signal, so that the driving source unit generates a square wave pulse current according to the square wave driving signal; synthesizing the square wave pulse current output by each driving source unit through the driving source module, the synthesized square wave pulse current being a pulse current, and outputting the pulse current to a laser diode array.

[0014] Thirdly, embodiments of the present invention provide a semiconductor pumped laser, including a housing and a laser diode array, and further including a pulse current generation circuit as described above; the pulse current generation circuit is connected to the laser diode array.

[0015] This invention provides a pulse current generation circuit, generation method, and semiconductor-pumped laser, comprising: a pulse signal control module and a drive source module connected in sequence; the drive source module is composed of multiple drive source units connected in parallel; the pulse signal control module is connected to an external drive square wave output device; the pulse current generation circuit is connected to an external laser diode array; the pulse signal control module is used to generate a polling signal and receive a square wave drive signal output by the drive square wave output device, and send the square wave drive signal to each drive source unit according to the polling signal, so that the drive source unit generates a square wave pulse current according to the square wave drive signal; the drive source module is used to synthesize the square wave pulse current output by each drive source unit, the synthesized square wave pulse current is a pulse current, and output the pulse current to the laser diode array. In this method, by setting multiple drive source units in parallel, the input power of the pulse current generation circuit is reduced, which can reduce the size and weight of the pulse current generation circuit, and also reduce the grid input power of the pulse current generation circuit, thereby improving the operational safety and stability of the pulse current generation circuit, and thus improving the safety of other devices connected to the semiconductor-pumped laser.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the pulse current generation circuit provided in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of a D flip-flop provided in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the driving source unit provided in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the charging circuit provided in Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the pulse current generation method provided in Embodiment 2 of the present invention;

[0024] Figure 6 This is a schematic diagram of a semiconductor pumped laser provided in Embodiment 3 of the present invention.

[0025] Icons: 01-Pulse signal control module; 02-Drive source module; 03-Drive square wave output device; 04-Power supply module; 2-Drive source unit; 21-Charging circuit; 22-Leading edge boosting circuit; 23-Main output circuit; 211-AC / DC converter; 212-DC / DC converter; IGBT1-First IGBT switch; IGBT2-Second IGBT switch; D1-First diode; D2-Second diode; D3-Third diode; D4-Fourth diode; L1-First inductor; E1-First capacitor; Dn-D flip-flop; 31-Casing; 32-Pulse current generation circuit; 33-Laser diode array. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In recent years, semiconductor laser technology has developed rapidly both internationally and domestically. High-energy, high-power solid-state lasers using semiconductor lasers as pump sources are increasingly widely used in military and scientific research fields. As pulse power supplies for high-power laser diode arrays, traditional power supply structures have been used, with single-unit power increasing larger and larger, often exceeding 10KW.

[0028] Existing pulse current generation circuits are bulky and heavy. For example, a 10kW pulse current generation circuit weighs approximately 60-80kg, causing inconvenience in production, transportation, installation, debugging, and maintenance. Furthermore, existing pulse current generation circuits mostly employ water cooling, resulting in complex structures and difficult maintenance. The high power input to the grid from existing pulse current generation circuits leads to greater electromagnetic interference, affecting the operational safety and stability of the laser diode array pulse drive source itself and adversely impacting other electrical equipment. Moreover, they are economically inefficient and cannot meet the requirements of high-reliability critical equipment in fields such as communications, aerospace, and military.

[0029] This application provides a pulse current generation circuit, generation method, and semiconductor pumped laser. By arranging multiple driving source units in parallel, the input power of the pulse current generation circuit is reduced, which can reduce the size and weight of the pulse current generation circuit, as well as the mains power input power of the pulse current generation circuit, thereby improving the operational safety and stability of the pulse current generation circuit, and further improving the safety of other devices connected to the semiconductor pumped laser.

[0030] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0031] Example 1:

[0032] Figure 1 This is a schematic diagram of the pulse current generation circuit provided in Embodiment 1 of the present invention.

[0033] Reference Figure 1 The pulse current generation circuit includes: a pulse signal control module 01 and a drive source module 02 connected in sequence; the drive source module 02 is composed of multiple drive source units 2 connected in parallel; the pulse signal control module 01 is connected to the drive square wave output device 03 of the peripheral device; and the pulse current generation circuit is connected to the laser diode array of the peripheral device.

[0034] In one embodiment, the pulse current generation circuit further includes a power supply module 04; the power supply module 04 is connected to the drive source module 02. The power supply module 04 is used to supply power to the drive source module 02.

[0035] Here, power module 04 can be AC ​​power.

[0036] In one embodiment, the pulse signal control module 01 is composed of multiple D flip-flops connected in series; each D flip-flop corresponds to a driving source unit 2.

[0037] A D flip-flop is used to generate a polling signal based on a reference clock signal.

[0038] Here, a 5-bit shift register composed of D flip-flops is used to cyclically distribute the pulse signal to the 5 drive source units 2. When any one of the drive source units 2 fails, the pulse signal control module 01 will automatically short-circuit its corresponding data bit and cyclically distribute the pulse signal to the remaining 4 drive source units 2 to continue working with the current operating parameters.

[0039] The pulse signal control module 01 is used to generate a polling signal and receive the square wave drive signal output by the drive square wave output device 03. According to the polling signal, the square wave drive signal is sent to each drive source unit 2 so that the drive source unit 2 generates a square wave pulse current according to the square wave drive signal.

[0040] Specifically, the reference clock signal determines the polling frequency of each drive source unit 2, and the reference clock signal is preset according to the actual situation.

[0041] A switch array is provided between the D flip-flop and the driver source unit 2. The D flip-flop generates a polling frequency based on a reference clock signal, so that the switch array connects or disconnects the corresponding driver source unit 2 according to the polling signal. (Refer to...) Figure 2 The pulse signal control module 01 includes a clock signal input terminal CLK, a reset signal input terminal RESET, and multiple D flip-flops Dn connected in series.

[0042] The CK terminal (clock input) of each D flip-flop is connected to the clock signal input terminal; in two adjacent D flip-flops, the Q terminal (data latch output) of the first D flip-flop is connected to the D terminal (data input) of the second D flip-flop.

[0043] The reset signal input terminal is connected to the SET terminal (set to 1) of one of the multiple D flip-flops, and to the RST terminal (asynchronous reset terminal) of the remaining D flip-flops; the Q terminal of each D flip-flop is connected to the switch array and the drive source unit 2 respectively.

[0044] The reset signal input terminal is used to output a reset signal.

[0045] The clock signal input terminal is used to receive the reference clock signal.

[0046] The pulse signal control module 01 receives the input reset signal and clock signal, and outputs the polling signal CLKn to the switch array. The RESET signal is connected to the SET terminal of one of the D flip-flops; when RESET is high, its Q terminal is set high. The RESET signal is also connected to the RST terminal of the remaining D flip-flops; when RESET is high, their Q terminals are set low. The CK terminals of all D flip-flops are connected to CLK.

[0047] The switch array includes multiple switches; each switch is connected to the D terminal of a drive source unit 2 and a D flip-flop Dn. The switches are used to perform connection or disconnection according to a polling signal, sequentially opening the corresponding switches to cause the drive source unit 2 to output a corresponding square wave pulse current.

[0048] The driving source module 02 is used to synthesize the square wave pulse current output by each driving source unit 2. The synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

[0049] Specifically, the pulse signal control module 01 receives a 500Hz square wave drive signal from the external drive square wave output device 03. The received square wave drive signal is divided by a D flip-flop so that each drive source unit 2 outputs a 100Hz square wave pulse current. The drive source module 02 synthesizes the square wave pulse current output by each drive source unit 2. The synthesized square wave pulse current is a pulse current, which is then output to the laser diode array. The laser diode array receives a 500Hz pulse current.

[0050] In one embodiment, reference is made to Figure 3 The driving source unit 2 includes a charging circuit 21, a leading edge lifting circuit 22, and a main output circuit 23; the first end of the leading edge lifting circuit 22 is connected to the first end of the charging circuit 21; the first end of the main output circuit 23 is connected to the second end of the charging circuit 21; and the second end of the leading edge lifting circuit 22 is connected to the second end of the main output circuit 23.

[0051] Here, the charging circuit 21 is a constant current circuit. The charging circuit 21 is connected to the power module 04, as shown in the reference diagram. Figure 4 The charging circuit 21 includes an AC / DC converter 211 and a DC / DC converter 212 connected in sequence. A capacitor is connected in parallel between the AC / DC converter 211 and the DC / DC converter 212.

[0052] The main output circuit 23 is used to generate a constant square wave pulse current based on the square wave drive signal.

[0053] In one embodiment, the main output circuit 23 includes: an electron discharge unit and a second IGBT switch IGBT2 connected in sequence; the electron discharge unit is connected to the charging circuit 21; the gate of the second IGBT switch IGBT2 is connected to the gate of the first IGBT switch IGBT1; the gate of the second IGBT switch IGBT2 is connected to the pulse signal control module 01; the first IGBT switch IGBT1 and the second IGBT switch IGBT2 respond synchronously to the square wave drive signal and close simultaneously; the emitter of the second IGBT switch IGBT2 is connected to the anode of the laser diode array.

[0054] Here, the discharge unit includes at least one capacitor and one inductor connected at one end. The more capacitors and inductors there are, the smaller the inductance. The number of capacitors and inductors is predetermined by the actual situation. One capacitor corresponds to one inductor.

[0055] Reference Figure 3 The first end of the inductor is connected to the charging circuit 21 and the first end of the capacitor respectively. The second end of the inductor is connected to the first end of the adjacent inductor or the collector of the second GBT switch I GBT2. The second end of the capacitor is grounded.

[0056] The charging circuit 21 is used to provide electrical energy to the discharge unit so that the discharge unit can store electrical energy.

[0057] The second I GBT switch I GBT2 is used to close when a square wave drive signal is received, so that the discharge unit generates a square wave pulse current and sends the square wave pulse current after compensation by the energy storage sub-unit to the laser diode array.

[0058] In one embodiment, the main output circuit 23 further includes a third diode D3 and a fourth diode D4.

[0059] The emitter of the second IGBT switch IGBT2, the first terminal of the third diode D3, and the first terminal of the fourth diode D4 intersect; the second terminal of the third diode D3 is connected to the laser diode array; and the second terminal of the fourth diode D4 is grounded.

[0060] Here, the third diode D3 is used to provide high voltage when the second IGBT switch IGBT2 is off, so as to isolate the main output circuit 23 from the laser diode array. The fourth diode D4 is used for freewheeling.

[0061] Leading edge boosting circuit 22 is used to compensate for the leading edge of the square wave pulse current.

[0062] In one embodiment, the leading edge boosting circuit 22 includes: an energy storage sub-unit and a first IGBT switch IGBT1 connected in sequence; the energy storage sub-unit is connected to the charging circuit 21; the gate of the first IGBT switch IGBT1 is connected to the main output circuit 23; the gate is connected to the pulse signal control module 01; and the emitter of the first IGBT switch IGBT1 is connected to the anode of the laser diode array.

[0063] The charging circuit 21 is used to provide electrical energy to the energy storage sub-unit so that the energy storage sub-unit stores electrical energy.

[0064] The first GBT switch, GBT1, is used to close when a square wave drive signal is received, so that the energy storage sub-unit is connected to the main output circuit 23.

[0065] The energy storage sub-unit is also used to perform leading-edge compensation of the square wave pulse current generated by the main output circuit 23 when it is connected to the main output circuit 23.

[0066] Here, the energy storage sub-unit is the first capacitor E1.

[0067] Specifically, the gates of the first IGBT switch IGBT1 and the second IGBT switch IGBT2 are connected to the external driving square wave output device 03, and the first emitter of the first IGBT switch IGBT1 is connected to the anode of the laser diode array. The energy storage sub-unit is used to store electrical energy. The driving square wave output device 03 is used to output a square wave driving signal with a preset width and preset amplitude. The first IGBT switch IGBT1 and the aforementioned second IGBT switch IGBT2 synchronously close in response to the square wave driving signal, connecting the energy storage sub-unit to the laser diode array, so as to perform leading-edge compensation of the pulse current output by the laser diode array through the aforementioned energy storage sub-unit.

[0068] In one embodiment, a current limiting device is provided between the energy storage sub-unit and the first I GBT switch I GBT1; the current limiting device is used to limit the current of the leading edge boosting circuit 22.

[0069] Here, the current limiting device is the first inductor L1. The collector of the first IGBT switch IGBT1 is connected to the first inductor L1.

[0070] In one embodiment, the leading edge boosting circuit 22 further includes a first diode D1 and a second diode D2.

[0071] The emitter of the first IGBT switch IGBT1, the first terminal of the first diode D1, and the first terminal of the second diode D2 intersect; the second terminal of the first diode D1 is connected to the laser diode array; and the second terminal of the second diode D2 is grounded.

[0072] The first diode D1 is used to provide high voltage when the first IGBT switch IGBT1 is turned off, so as to isolate the leading edge boost circuit 22 from the laser diode array. The second diode D2 is used for freewheeling.

[0073] Specifically, taking a 2kW output power driver source unit 2 as an example, its technical specifications are: pulse current 250A; pulse voltage 250V; pulse width 300μs; maximum output pulse frequency 120Hz. Each driver source unit 2 can be connected in parallel through a parallel control interface.

[0074] This invention provides a pulse current generation circuit, comprising: a pulse signal control module and a drive source module connected in sequence; the drive source module is composed of multiple drive source units connected in parallel; the pulse signal control module is connected to an external drive square wave output device; the pulse current generation circuit is connected to an external laser diode array; the pulse signal control module is used to generate a polling signal and receive a square wave drive signal output by the drive square wave output device, and send the square wave drive signal to each drive source unit according to the polling signal, so that the drive source unit generates a square wave pulse current according to the square wave drive signal; the drive source module is used to synthesize the square wave pulse current output by each drive source unit, the synthesized square wave pulse current is a pulse current, and output the pulse current to the laser diode array. In this method, by setting multiple drive source units in parallel, the input power of the pulse current generation circuit is reduced, which can reduce the size and weight of the pulse current generation circuit, and also reduce the grid input power of the pulse current generation circuit, thereby improving the operational safety and stability of the pulse current generation circuit, and thus improving the safety of other devices connected to the semiconductor pump laser. At the same time, with this parallel connection of multiple drive source units, fault diagnosis and repair only requires replacing the faulty drive source unit to restore the equipment to normal working condition, resulting in lower maintenance and transportation costs.

[0075] Example 2:

[0076] Figure 5 This is a schematic diagram of the pulse current generation method provided in Embodiment 2 of the present invention.

[0077] The pulse current generation method is applied to the pulse current generation circuit described above.

[0078] Reference Figure 5 The pulse current generation circuit includes:

[0079] Step S101: The pulse signal control module generates a polling signal and receives the square wave drive signal output by the drive square wave output device. The square wave drive signal is sent to each drive source unit according to the polling signal so that the drive source unit generates a square wave pulse current according to the square wave drive signal.

[0080] Step S102: The square wave pulse current output by each driving source unit is synthesized by the driving source module. The synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

[0081] This invention provides a pulse current generation method. In this method, by setting multiple driving source units in parallel, the input power of the pulse current generation circuit is reduced, which can reduce the size and weight of the pulse current generation circuit, as well as the grid input power of the pulse current generation circuit, thereby improving the operational safety and stability of the pulse current generation circuit, and further improving the safety of other devices connected to the semiconductor pump laser.

[0082] Example 3:

[0083] Figure 6 This is a schematic diagram of a semiconductor pumped laser provided in Embodiment 3 of the present invention.

[0084] Reference Figure 6 The semiconductor pumped laser includes a housing 31 and a laser diode array 33, and also includes the aforementioned pulse current generation circuit 32; the pulse current generation circuit 32 is connected to the laser diode array 33.

[0085] This invention provides a semiconductor-pumped laser. In this method, by arranging multiple driving source units in parallel, the input power of the pulse current generation circuit is reduced, which can reduce the size and weight of the pulse current generation circuit, as well as the grid input power of the pulse current generation circuit, thereby improving the operational safety and stability of the pulse current generation circuit, and further improving the safety of other devices connected to the semiconductor-pumped laser.

[0086] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0087] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0088] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0090] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A pulse current generating circuit characterized by comprising: include: A pulse signal control module and a drive source module connected in sequence; The driving source module is composed of multiple driving source units connected in parallel; the pulse signal control module is connected to the driving square wave output device of the peripheral device; the pulse current generation circuit is connected to the laser diode array of the peripheral device. The pulse signal control module is used to generate a polling signal and receive a square wave drive signal output by the drive square wave output device, and send the square wave drive signal to each drive source unit according to the polling signal, so that the drive source unit generates a square wave pulse current according to the square wave drive signal. The driving source module is used to synthesize the square wave pulse current output by each driving source unit. The synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array. The driving source unit includes a charging circuit, a leading edge lifting circuit, and a main output circuit; The leading edge boosting circuit includes: an energy storage sub-unit and a first IGBT switch connected in sequence; the energy storage sub-unit is connected to the charging circuit; the gate of the first IGBT switch is connected to the main output circuit; the gate is connected to the pulse signal control module; the emitter of the first IGBT switch is connected to the anode of the laser diode array. The charging circuit is used to provide electrical energy to the energy storage sub-unit so that the energy storage sub-unit stores electrical energy; The first IGBT switch is used to close when the square wave drive signal is received, so as to connect the energy storage sub-unit to the main output circuit; The energy storage sub-unit is also used to perform leading-edge compensation on the square wave pulse current generated by the main output circuit when connected to the main output circuit.

2. The pulse current generation circuit according to claim 1, characterized by, The pulse signal control module is composed of multiple D flip-flops connected in series; each D flip-flop corresponds to one driving source unit. The D flip-flop is used to generate the polling signal based on the reference clock signal.

3. The pulse current generating circuit according to claim 1, characterized in that, The first terminal of the leading edge lifting circuit is connected to the first terminal of the charging circuit; the first terminal of the main output circuit is connected to the second terminal of the charging circuit; the second terminal of the leading edge lifting circuit is connected to the second terminal of the main output circuit. The main output circuit is used to generate a constant square wave pulse current according to the square wave drive signal; The leading edge enhancement circuit is used to compensate for the leading edge of the square wave pulse current.

4. The pulse current generating circuit according to claim 3, characterized in that, A current limiting device is provided between the energy storage subunit and the first IGBT switch mentioned above; The current limiting device is used to limit the current of the leading edge boosting circuit.

5. The pulse current generating circuit according to claim 3, characterized in that, The main output circuit includes: an electron discharge unit and a second IGBT switch connected in sequence; the electron discharge unit is connected to the charging circuit; the gate of the second IGBT switch is connected to the gate of the first IGBT switch; the gate of the second IGBT switch is connected to the pulse signal control module; the first IGBT switch and the second IGBT switch respond synchronously to the square wave drive signal to close simultaneously; the emitter of the second IGBT switch is connected to the anode of the laser diode array. The charging circuit is used to provide electrical energy to the electron discharge unit so that the electron discharge unit can store electrical energy; The second IGBT switch is used to close when the square wave drive signal is received, so that the discharge unit generates the square wave pulse current and sends the square wave pulse current after being compensated by the energy storage subunit to the laser diode array.

6. The pulse current generating circuit according to claim 5, characterized in that, The leading edge boosting circuit further includes a first diode and a second diode; the main output circuit further includes a third diode and a fourth diode. The emitter of the first IGBT switch, the first terminal of the first diode, and the first terminal of the second diode intersect; the second terminal of the first diode is connected to the laser diode array; the second terminal of the second diode is grounded. The emitter of the second IGBT switch, the first terminal of the third diode, and the first terminal of the fourth diode intersect; the second terminal of the third diode is connected to the laser diode array; and the second terminal of the fourth diode is grounded.

7. The pulse current generating circuit according to claim 1, characterized in that, The pulse current generation circuit also includes a power supply module; the power supply module is connected to the drive source module. The power module is used to supply power to the drive source module.

8. A method for generating pulse current, characterized in that, The method is applied to the pulse current generation circuit according to any one of claims 1-7; the method includes: The pulse signal control module generates a polling signal and receives the square wave drive signal output by the drive square wave output device. The square wave drive signal is sent to each drive source unit according to the polling signal, so that the drive source unit generates a square wave pulse current according to the square wave drive signal. The square wave pulse current output by each driving source unit is synthesized by the driving source module. The synthesized square wave pulse current is a pulse current, and the pulse current is output to the laser diode array.

9. A semiconductor-pumped laser, characterized in that, It includes a housing and a laser diode array, and further includes the pulse current generating circuit according to any one of claims 1-7; the pulse current generating circuit is connected to the laser diode array.

Images